Through a spokesperson, the band announced on Monday that Followill was “suffering from vocal issues and exhaustion.”

“The band is devastated,” said the rep in a statement. “But in order to give their fans the shows they deserve, they need to take this break.”

Over the weekend, video footage of Followill slurring his words on stage and confronting the crowd went viral. “For the record, I’m not drunk,” he said in the clip. “I’m about to fall down here because I’m so f–in’ hot.”

But bassist Jared Followill later admitted over Twitter that “there are internal sicknesses & problems that have needed to be addressed” and “there are problems in our band bigger than not drinking enough Gatorade.”

Due to the band’s international tour schedule, the US tour dates will not be rescheduled, but tickets will be refunded. The band will resume touring in Canada at the Rogers Center in Vancouver, BC, on September 28th for a show that was originally scheduled for September 14.

“Utterly depressed,” Jared tweeted in response to the cancellations. “It’s completely out of my hands. Family has to come 1st.”